Thread is expecting the list to be of equal length.
In the first case {1,1} is a list of length 2 and {{1,1},{2,2}} is also a
list of length 2.
Obviously in the second case {{1,1},{2,2},{3,3}} is a list of length 3 and
Thread generates an error message
yehuda
On 3/29/06, Virgilio, Vincent - SSD <Vincent.Virgilio at itt.com> wrote:
>
>
>
> Hello,
>
> Why does this work:
>
> Thread[ Plus[ {1,1} , { {1,1} , {2,2} } ] ]
>
> but this doesn't?
>
> Thread[ Plus[ {1,1} , { {1,1} , {2,2} , {3,3} } ] ]
>
> Thanks,
>
> Vince Virgilio
>
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